PRE-DISTORTED SIGNAL GENERATION METHOD Russian patent published in 2020 - IPC H04B1/62 

FIELD: communication equipment.

SUBSTANCE: invention relates to communication engineering and can be used for correction of nonlinearity of transmitting path in conditions of necessity to comply with requirements for electromagnetic compatibility of radioelectronic equipment. Preliminary digital signal processing is carried out, namely interpolation, frequency upward transfer, pre-distortion, reverse frequency transfer and signal filtering. Pre-distortion function is specified in form of weighted sum of E-polynomials. Identification of parameters of pre-distortion function may be performed by iteration method or by direct calculation based on results of measurements of characteristics of output signal of radio facility.

EFFECT: reduction of out-of-band radiations of radio facility with digital correction of non-linearity, reduced number of parameters of pre-distortion function in case of high inertia of formed nonlinearity and compliance of parameters of proposed pre-distortion function with relative amplitudes and phases of combinational components of the two-tone signal allow direct calculation of parameters, which ensures uniqueness of the found solution and reduces time of their identification.

1 cl, 4 dwg